2 points
if jk lm, which statement is true?

a. jk and lm meet at a straight angle.
b. jk and lm meet at a right angle.
c. jk and lm
are not in the same plane.
d. jk and lm are coplanar and do not intersect.

B.

Step-by-step explanation:

The symbol between JK and LM mean that they are perpendicular, it is, that at their intersection 90 degrees angles are formed (those are right angles). So, the correct option here is option B. JK and LM meet at a right angle.

Here I attach a dray of how an intersection like this must look like. I hope it is helpful for you. In the draw four right angles are formed, however, this is not necessary, coul be only one or two depending on the length of the lines segments.

(a) the volume of the cone is 20/3 in3

hence, option a is correct.